﻿/******************************************************************************
    QDeviceWatcher: Device watcher class
    Copyright (C) 2011-2015 Wang Bin <wbsecg1@gmail.com>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
******************************************************************************/

#ifndef QDEVICEWATCHER_H
#define QDEVICEWATCHER_H

#include <QtCore/QObject>
#include <QtCore/QEvent>
#include <QtCore/qglobal.h>

#if defined(Q_OS_WIN)
//dynamic and static are different
#if   defined(BUILD_QDEVICEWATCHER_LIB)
#     define Q_DW_EXPORT Q_DECL_EXPORT
#elif defined(BUILD_QDEVICEWATCHER_STATIC)
#     define Q_DW_EXPORT
#else
#     define Q_DW_EXPORT Q_DECL_IMPORT
#endif
#else
//dynamic and static are equal to each other
#     define Q_DW_EXPORT
#endif


class QDeviceWatcherPrivate;

class Q_DW_EXPORT QDeviceWatcher : public QObject
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QDeviceWatcher)
public:
    explicit QDeviceWatcher(QObject* parent = 0);
    ~QDeviceWatcher();

    bool start();
    bool stop();
    bool isRunning() const;

    void appendEventReceiver(QObject* receiver);

signals:
    void deviceAdded(const QString& dev);
    void deviceChanged(const QString& dev); //when umounting the device
    void deviceRemoved(const QString& dev);

protected:
    bool running;
    QDeviceWatcherPrivate* d_ptr;
};


class Q_DW_EXPORT QDeviceChangeEvent : public QEvent
{
public:
    enum Action { Add, Remove, Change};
    //static const Type EventType; //VC link error

    explicit QDeviceChangeEvent(Action action, const QString& device);

    Action action() const {return m_action;}
    QString device() const {return m_device;}
    static Type registeredType() {
        static Type EventType = static_cast<Type>(registerEventType());
        return EventType;
    }

private:
    Action m_action;
    QString m_device;
};

#endif // QDEVICEWATCHER_H
